1970's Fender Musicmaster Bass Amp  - great for guitar too. Uses two 6AQ5 tubes for output and a 12AX7 preamp tube. There is no phase splitter tube, it uses an expensive transformer as an interstage phase splitter! Solid state rectifier. 12" Fender labeled speaker made by CTS (Chicago Telephone Supply) in the 34th week of 1974.

The earliest Musicmaster had a bizarre semi-rectangular speaker that was both unreliable and unreplacable. Don't buy one of those unless you're a collector.

Now for the non-geek info: This thing sounds phenomenal! Just the sweetest sounding little tube amp that can put out more volume than something like a Fender Champ.

The cabinet has an indentation and torn cloth on the top, shown in pictures, otherwise cabinet and faceplate are excellent!

The 1970s Fender Musicmaster Tube Bass Amp is a vintage combo amplifier suitable for bass and electric guitars. It features two 6AQ5 tubes and a 12AX7A vacuum tube in a 12" Fender speaker, delivering 12 watts of power. The Musicmaster Amp is part of Fender's acclaimed product line, known for its classic design and reliable performance for musicians seeking a retro sound.